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Stoichiometry

Stoichiometry
Weight of 56 litres of ammonia at N.T.P. is __________ gm.

2.5
56
42.5
2800

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Stoichiometry
A sample of well water contains 140 gm/m³ Ca²⁺ ions and 345 gm/m³ Na⁺ ions. The hardness of the sample of water, expressed in terms of equivalent CaCO₃ in gm/m³ is (assuming atomic masses of Ca :40, Na : 23, C : 12, O : 16)

485
350
140
345

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Stoichiometry
The heats of vaporisation of CS₂, C₂H₅OH &H₂O are 26.8, 38.6 & 40.6 KJ/kg mole respectively. The order of decreasing inter-molecular forces in these liquids is

H₂O > C₂H₅OH > CS₂
CS₂ > H₂O > C₂H₅OH
CS₂ > C₂H₅OH > H₂O
H₂O > CS₂ > C₂H₅OH

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Stoichiometry
In a mixture of benzene vapor and nitrogen gas at a total pressure of 900 mm Hg, if the absolute humidity of benzene is 0.2 kg benzene/kg nitrogen, the partial pressure of benzene in mm Hg is

60.3
720
200
180

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Stoichiometry
Kopp's rule is concerned with the calculation of

Surface tension
Viscosity
Thermal conductivity
Heat capacity

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Stoichiometry
40 gms each of the methane and oxygen are mixed in an empty container maintained at 40°C. The fraction of the total pressure exerted by oxygen is

2/3
1/4
1/3
1/2

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